Elevator



(No Model.)

T. MASON;

ELEVATOR.

No. 481,577. Patented Aug. 30, 1892.

PATENT THOMAS MASON, on TOPEKA, KANSAS.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 481,577, dated August30, 1892.

Applica ion filed July 17,1891. Serial No. 399,887. (No model.)

To aZZ whom it may concern.-

Be it known that I, THOMAS MASON, a citizen of the United States,residing at Topeka, in the county of Shawnee and State of Kansas, haveinvented a new and useful Improvement in Elevator Hatchway-Doors, ofwhich the following is a specification.

My invention relates to improvements in self-closing hatchway-doors; andits objects are to provide a covering for hatchways that will be closedwhen the elevator-car is not passing through and that will openautomatically as the elevator-car approaches. I attain these objects bythe mechanism illustrated in the accompanying drawings,in which similarletters of reference indicate like parts.

Figure l is a view of the framework of an elevator, showing the cage atthe bottom and the hatchway-door closed. Fig. 2 is a view of one of thehatchway-doors swung back, showing the support and plan of Working thesame.

In the drawings, F F are double hatchwaydoors meeting in the center,made in the form of brackets, the upper surface in a horizontal planewhen closed, and resting against each other.

U U U U are two pair of curved levers below the doors rigidly secured attheir upper ends to the doors and near the extreme lower ends arepivoted at P P P P to the posts on the sides of the elevator-well. Thelevers have curved arms P, which project into the elevator-well whenclosed and support the doors F F. These levers have another curved armP, which projects into the well and into the path of the car, wherebythe doors are rocked on the pivots when said curved arms P are contactedwith by the car. The pivots P below the doors on the sides of the wellsupport the levers U U U U and the doors F. Said levers and doors rockon these pivots. Similar pivots are placed above the doors and supporttwo pair of curved levers.

' A A A A designate a double pair of curved levers above the doors,secured to the sides of the well by pivots P P P P. The lower ends ofthese levers play loosely in loops on the doors. The levers A areprovided with curved arms A, which project into the elevator-well whenthe doors are closed. Said levers have also a curved elongation A whichextends beyond the pivots into the elevator-Well in the path of the car.

R R R R are projections on the elevator cage or car to engage the curvedarms of the levers, and thus open and close the doors. Nhen the doorsare closed, the curved levers permit the projections on the cage to passby the ends farthest from the doors and the pivots, and then theprojections R engage the arm on the curved levers between the pivots andthe doors. As the levers are pressed the doors rock back, assisting theopening by their own weight after they pass the vertical line ofsupport. As the doors open, the ends of the levers farthest from thedoors are proj ected into the well. When the cage ascends, theprojections on the cage push against said curved ends of the levers andthrow the doors back into place and close them. The lowersupporting-levers hold the doors firmly closed, because the center ofgravity is inside the line of support, any Weight placed on the doorssimply holding them more secure. The doors, being rigidly attached tothe lower levers, move in an arc of a circle and come to a horizontalposition only when closed.

Having thus fully described my invention, what I desire to claim is 1.The combination of a lever pivoted to the side of an elevator-well andhaving a curved arm projecting into said well, a hatchway-door rigidlysecured to the lever and adapted to swing therewith in an arc of acircle, and an elevator-car provided with a projection adapted to engagethe curved arm of the lever to rock the same and to swing the door outof the path of the car, all substan tially as described.

2. The combination of a lever pivoted to the side of an elevator-welland having a curved arm projecting into the well, ahatchway-door rigidlysecuredto the lever, a lever located above the door and having its upperend projecting into the well and its lower end loosely connected to thedoor, and an elevatorcar provided with a projection to engage the leversto operate the door, all substantially as described.

. 3. The combination of two pairs of levers U, pivoted to the sides ofan elevator-well and having their lower ends projecting into the well,doors F, rigidly secured to the top of each swing the doors out of thepath of the car, all pair of levers, two pairs of levers A, pivotedsubstantially as described. above the doors and having their upper endsprojecting into the Well and their lower ends THOMAS MASON. 5 looselyconnected to said doors, and an ele- Witnesses:

vator-car provided with projections adapted H. D. MARTIN,

to engage the lovers to rock the same and to J. H. TAYLOR.

